if let Some(ref srcbuf) = self.ipbs.get_lastref() {
bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, ZERO_MV);
}
if let Some(ref srcbuf) = self.ipbs.get_lastref() {
bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, ZERO_MV);
}